C. difficile infection requires documenting the presence of toxin in the stools, usually by testing for the gene that produces toxin B, using a method called PCR. It is very sensitive, so it should not be used to test solid stools since that is likely a carrier state.
Definition of vassal. 1  1 : a person under the protection of a feudal lord to whom he has vowed homage and fealty : a feudal tenant. 2  2 : one in a subservient or subordinate position.
Definition of subject. 1  1 : one that is placed under authority or control: such asa : vassalb (1) : one subject to a monarch and governed by the monarch's law (2) : one who lives in the territory of, enjoys the protection of, and owes allegiance to a sovereign power or state.